or for something more visual

http://trendistic.indextank.com/siri

People are talking more about Siri since the release date (on average) and for more dramatic effect, look at the results over a 30 day timeframe - not bad considering that Siri is essentially 2 year old technology.

Yeah, people are impressed by Siri, even if they just want to make fun of it (in Australia we call that Tall Poppy Syndrome)